to identify an appropriate index for monitoring and evaluation of drought, rainfall data obtained from meteorological stations of ilam province from 2000 to 2011 and modis satellite images with 16-day intervals were collected and processed. the standardized precipitation index (spi) was calculated based on rainfall data; therefore, the rainfall data were used for measuring spi and satellite ima...

Drought in South Asia affect food and water security and pose challenges for millions of people. For policy-making, planning, and management of water resources at sub-basin or administrative levels, high-resolution datasets of precipitation and air temperature are required in near-real time. We develop a high-resolution (0.05°) bias-corrected precipitation and temperature data that can be used ...

The presented paper compares forecast of drought indices based on two different models of artificial neural networks. The first model is based on feedforward multilayer perceptron, sANN, and the second one is the integrated neural network model, hANN. The analyzed drought indices are the standardized precipitation index (SPI) and the standardized precipitation evaporation index (SPEI) and were ...

Drought is a climatic event that threatens the environment and human life with an ambiguity of location time. Recently, droughts can be analyzed for different periods help mathematical methods developing technology. This study aims to perform drought analysis in 126 designated points Turkey. The data includes monthly total precipitation values between March 2000 February 2021, obtained from PER...

The present paper focused on the analysis of drought in the Heihe River basin based on daily precipitation data observed at 13 weather stations covered from 1961 to 2010. The spatial and temporal variation of drought was estimated by means of the Standardized Precipitation Index (SPI), linear regression analysis and inverse distance weighted analysis. The SPI series on 1-month, 3-month, 6-month...

The Standardized Precipitation Index (SPI) has been recognized as the standard index that should be used for quantifying and reporting meteorological drought. This study aims to present application of two-dimensional correlation method determining spatial temporal variability drought among SPI series. Heatmaps were a new way visualizing series which enables visual inspection dry wet periods. de...

drought is one of the most important weather-induced phenomena which may have severe impacts on different areas such as agriculture, economy, energy production, and society. a number of drought indices have been introduced and used in various countries to date. in the current study, four meteorological drought indices including percent of normal precipitation index (pnpi), standard index of ann...

this study was conducted to identify drought event and its emerging regions in markazi desert, iran with focus onsemnan province in a 30 years statistical period. in this research, 61 stations having adequate data selected and usedafter extracting annual statistic from monthly and daily data. standardized precipitation index values for each stationwere calculated and classified. the results hav...